From the official docs:
A build constraint is evaluated as the OR of space-separated options.
Each option evaluates as the AND of its comma-separated terms.
Anyways, only linux and windows are supported platforms. Running these
tests on darwin causes a top level `make test` to fail, and one has to
scroll all the way up to realize that it is only these alts tests which
have failed, and not something that one is actively working on.
* Modified tests to use tlogger.
* Fail on errors, with error expectations.
* Added expects and MixedCapsed grpclb_config tests
* Moved tlogger to grpctest, moved leakcheck tester to grpctest.go
* Added ExpectErrorN()
* Removed redundant leak checks
* Fixed new test
* Made tlogger globals into tlogger methods
* ErrorsLeft -> EndTest
* Removed some redundant lines
* Fixed error in test and empty map in EndTest
